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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £380

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/12. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
10 Dec — 17 Dec1
1 adult
1 adult, Economy, 0 bags

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Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2025.

Wed 3/1220:40STN - IAD
2 stops23h 35mMultiple Airlines
Tue 9/1217:30IAD - STN
2 stops21h 45mMultiple Airlines
Deal found 9/11£437
Fri 12/1206:30STN - IAD
1 stop14h 05mMultiple Airlines
Sun 14/1221:00IAD - STN
1 stop16h 20mMultiple Airlines
Deal found 8/11£442
Fri 28/1106:30STN - IAD
1 stop14h 05mMultiple Airlines
Tue 2/1221:00IAD - STN
1 stop16h 20mMultiple Airlines
Deal found 8/11£450
Tue 2/1217:20STN - IAD
2 stops32h 40mMultiple Airlines
Mon 8/1217:30IAD - STN
2 stops25h 25mMultiple Airlines
Deal found 9/11£473
Fri 21/1108:30STN - IAD
1 stop16h 00mMultiple Airlines
Sun 23/1121:00IAD - STN
1 stop18h 05mMultiple Airlines
Deal found 8/11£475
Sun 16/1108:30STN - IAD
1 stop12h 05mMultiple Airlines
Sun 23/1121:00IAD - STN
1 stop18h 05mMultiple Airlines
Deal found 9/11£501
Thu 18/1206:00STN - IAD
1 stop18h 30mMultiple Airlines
Mon 29/1217:05IAD - STN
1 stop9h 45mMultiple Airlines
Deal found 8/11£521
Wed 3/1205:55STN - IAD
2 stops20h 05mMultiple Airlines
Sat 6/1217:30IAD - STN
2 stops25h 05mMultiple Airlines
Deal found 10/11£523
Fri 5/1208:30STN - IAD
2 stops15h 00mMultiple Airlines
Fri 12/1219:40IAD - STN
2 stops12h 40mMultiple Airlines
Deal found 7/11£526
Wed 10/1206:00STN - IAD
2 stops17h 30mMultiple Airlines
Mon 15/1219:40IAD - STN
2 stops15h 05mMultiple Airlines
Deal found 9/11£526
Mon 24/1106:30STN - IAD
1 stop18h 00mMultiple Airlines
Mon 1/1221:00IAD - STN
1 stop16h 20mMultiple Airlines
Deal found 9/11£527
Sun 7/1209:35STN - IAD
2 stops34h 40mMultiple Airlines
Sun 14/1222:30IAD - STN
2 stops17h 25mMultiple Airlines
Deal found 9/11£529

Cheap flight deals from Stansted to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 November 2025.

Round-trip from

£427

One-way from

£380

Popular in

July

Cheapest in

February

Average price

£500
23/1-25/1
  • 23/1-25/1
  • 4 total stops
  • 36h 25m total
  • London to Washington, D.C.
Search Deals
16/12
  • 16/12
  • 2 total stops
  • 35h 30m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 November 2025.
Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Stansted

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 3/12

20:40-15:15

2 stops23h 35m

Washington, D.C. Dulles Intl

Tue 9/12

17:30-20:15

2 stops21h 45m

£437

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 23/1

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Sun 25/1

17:05-11:05

1 stop13h 00m

£463

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 2/12

17:20-21:00

2 stops32h 40m

Washington, D.C. Dulles Intl

Mon 8/12

17:30-23:55

2 stops25h 25m

£473

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 2/12

08:55-15:50

2 stops35h 55m

Washington, D.C. Dulles Intl

Sat 6/12

20:30-20:05

2 stops18h 35m

£475

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 21/11

08:30-19:30

1 stop16h 00m

Washington, D.C. Dulles Intl

Sun 23/11

21:00-20:05

1 stop18h 05m

£475

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 13/3

08:05-22:00

2 stops17h 55m

Washington, D.C. Dulles Intl

Tue 17/3

18:30-23:50

2 stops25h 20m

£479

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 22/2

05:55-21:00

2 stops20h 05m

Washington, D.C. Dulles Intl

Tue 3/3

17:05-07:50

1 stop9h 45m

£520

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 24/12

06:30-18:30

2 stops17h 00m

Washington, D.C. Dulles Intl

Wed 31/12

19:40-22:50

2 stops22h 10m

£523

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 28/1

20:55-15:15

2 stops23h 20m

Washington, D.C. Dulles Intl

Wed 4/2

22:30-22:15

2 stops18h 45m

£526

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/12

06:00-18:30

2 stops17h 30m

Washington, D.C. Dulles Intl

Mon 15/12

19:40-15:45

2 stops15h 05m

£526

Flights are sorted by cheapest return flights first.

Deals found on 8/11

Showing 1-10 of 22 results
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Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

  • Can I find deals for business class flights from Stansted to Dulles Intl?

    Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

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Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to Dulles Intl flexibly with Cheapflights today.

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